Its 1500$ a seat, plus $1500 for iOS plus $1500 for Android, PER PERSON. Then another $500 if you want the cache asset server.
So, it could easily be 5k per seat. Now, is that alot? To me no, but I am used to bootstrapping CG workstations that are 3k a pop with 10k worth of software on them.
But when these are things that should not really cause problems i.e. versioning? and that you can't work around with an easy solution like git/hg/perforce, that makes pipeline a little awkward. So when you see software that accomplishes the same workflow sans the hacky ass workarounds, for "less" upfront money? Water flows to the least resistant path.